package collection;

import java.util.ArrayList;
import java.util.Collection;

public class CollectionDemo {
    public static void main(String[] args) {
        Collection collection = new ArrayList();
        Point point = new Point(1,2);
        collection.add(point);
        System.out.println(collection);
        point.setX(100);
        System.out.println(collection
        );





        /*Collection c = new ArrayList();
        c.add(new Point(1,2));
        c.add(new Point(3,4));
        c.add(new Point(5,6));
        c.add(new Point(7,8));
        c.add(new Point(9,0));
        c.add(new Point(1,2));
        System.out.println(c);

        Point point = new Point(1,2);
        boolean b = c.contains(point);
        System.out.println(b);

        c.remove(point);
        System.out.println(c);*/





        /*Collection c = new ArrayList();
        c.add("one");
        c.add("two");
        c.add("three");
        c.add("four");
        c.add("five");
        System.out.println(c);
        System.out.println(c.size());
        System.out.println(c.isEmpty());
        c.clear();
        System.out.println(c.size());
        System.out.println(c.isEmpty() );*/
    }
}
